/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=DEEPEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/eca-rers2012/Problem13_label51.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 18:06:53,674 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 18:06:53,677 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 18:06:53,718 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 18:06:53,719 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 18:06:53,721 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 18:06:53,723 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 18:06:53,725 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 18:06:53,728 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 18:06:53,730 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 18:06:53,731 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 18:06:53,733 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 18:06:53,734 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 18:06:53,735 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 18:06:53,737 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 18:06:53,738 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 18:06:53,739 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 18:06:53,741 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 18:06:53,754 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 18:06:53,756 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 18:06:53,759 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 18:06:53,764 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 18:06:53,767 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 18:06:53,770 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 18:06:53,777 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 18:06:53,777 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 18:06:53,778 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 18:06:53,787 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 18:06:53,788 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 18:06:53,789 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 18:06:53,790 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 18:06:53,791 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 18:06:53,792 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 18:06:53,793 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 18:06:53,795 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 18:06:53,795 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 18:06:53,796 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 18:06:53,796 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 18:06:53,797 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 18:06:53,798 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 18:06:53,799 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 18:06:53,800 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-27 18:06:53,828 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 18:06:53,829 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 18:06:53,834 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 18:06:53,834 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 18:06:53,834 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 18:06:53,835 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 18:06:53,835 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 18:06:53,835 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 18:06:53,836 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 18:06:53,836 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 18:06:53,836 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 18:06:53,836 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 18:06:53,837 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 18:06:53,837 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 18:06:53,837 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 18:06:53,838 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 18:06:53,838 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 18:06:53,838 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 18:06:53,838 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 18:06:53,839 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 18:06:53,839 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 18:06:53,839 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 18:06:53,840 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 18:06:53,840 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 18:06:53,840 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 18:06:53,841 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 18:06:53,841 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 18:06:53,841 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 18:06:53,841 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 18:06:53,842 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 18:06:54,264 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 18:06:54,300 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 18:06:54,303 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 18:06:54,304 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 18:06:54,305 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 18:06:54,307 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem13_label51.c [2020-10-27 18:06:54,382 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/19810e662/c70aa0d238be431c849c763b4092b056/FLAG6cdec9112 [2020-10-27 18:06:55,376 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 18:06:55,376 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem13_label51.c [2020-10-27 18:06:55,410 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/19810e662/c70aa0d238be431c849c763b4092b056/FLAG6cdec9112 [2020-10-27 18:06:55,883 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/19810e662/c70aa0d238be431c849c763b4092b056 [2020-10-27 18:06:55,888 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 18:06:55,897 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 18:06:55,900 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 18:06:55,900 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 18:06:55,904 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 18:06:55,906 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 06:06:55" (1/1) ... [2020-10-27 18:06:55,910 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@301ec25a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:06:55, skipping insertion in model container [2020-10-27 18:06:55,910 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 06:06:55" (1/1) ... [2020-10-27 18:06:55,920 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 18:06:56,090 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 18:06:57,849 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 18:06:57,866 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 18:06:58,681 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 18:06:58,750 INFO L208 MainTranslator]: Completed translation [2020-10-27 18:06:58,751 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:06:58 WrapperNode [2020-10-27 18:06:58,751 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 18:06:58,752 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 18:06:58,752 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 18:06:58,752 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 18:06:58,768 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:06:58" (1/1) ... [2020-10-27 18:06:58,768 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:06:58" (1/1) ... [2020-10-27 18:06:58,861 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:06:58" (1/1) ... [2020-10-27 18:06:58,861 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:06:58" (1/1) ... [2020-10-27 18:06:58,998 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:06:58" (1/1) ... [2020-10-27 18:06:59,036 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:06:58" (1/1) ... [2020-10-27 18:06:59,075 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:06:58" (1/1) ... [2020-10-27 18:06:59,114 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 18:06:59,117 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 18:06:59,117 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 18:06:59,117 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 18:06:59,118 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:06:58" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 18:06:59,213 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 18:06:59,213 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 18:06:59,214 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 18:06:59,214 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-27 18:06:59,215 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-27 18:06:59,215 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-27 18:06:59,215 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-27 18:06:59,215 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 18:06:59,215 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-27 18:06:59,216 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-27 18:06:59,217 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-27 18:06:59,217 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-27 18:06:59,217 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 18:06:59,218 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 18:06:59,218 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 18:06:59,219 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 18:06:59,219 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 18:06:59,219 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-27 18:06:59,219 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 18:06:59,219 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 18:06:59,220 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 18:06:59,220 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 18:06:59,220 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 18:06:59,220 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 18:06:59,220 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 18:07:09,580 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 18:07:09,580 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-27 18:07:09,584 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 06:07:09 BoogieIcfgContainer [2020-10-27 18:07:09,584 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 18:07:09,589 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 18:07:09,589 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 18:07:09,595 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 18:07:09,596 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 06:06:55" (1/3) ... [2020-10-27 18:07:09,597 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4509d607 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 06:07:09, skipping insertion in model container [2020-10-27 18:07:09,597 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:06:58" (2/3) ... [2020-10-27 18:07:09,598 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4509d607 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 06:07:09, skipping insertion in model container [2020-10-27 18:07:09,598 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 06:07:09" (3/3) ... [2020-10-27 18:07:09,600 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem13_label51.c [2020-10-27 18:07:09,619 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 18:07:09,626 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 18:07:09,640 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 18:07:09,678 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 18:07:09,678 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 18:07:09,678 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 18:07:09,678 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 18:07:09,679 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 18:07:09,679 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 18:07:09,679 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 18:07:09,679 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 18:07:09,772 INFO L276 IsEmpty]: Start isEmpty. Operand 1123 states. [2020-10-27 18:07:09,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-27 18:07:09,779 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:07:09,781 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 18:07:09,781 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:07:09,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:07:09,792 INFO L82 PathProgramCache]: Analyzing trace with hash -707284782, now seen corresponding path program 1 times [2020-10-27 18:07:09,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:07:09,803 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [570282453] [2020-10-27 18:07:09,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:07:10,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:07:10,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:07:10,578 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:07:10,578 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-27 18:07:10,578 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:07:10,578 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 522 [2020-10-27 18:07:10,582 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:07:10,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 18:07:10,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 18:07:10,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-27 18:07:10,583 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-27 18:07:10,772 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:07:10,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:07:10,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:07:10,811 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:07:10,812 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:07:10,812 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:07:10,812 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-10-27 18:07:10,812 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:07:10,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:07:10,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:07:10,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 18:07:10,813 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:07:10,833 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 18:07:10,834 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [570282453] [2020-10-27 18:07:10,836 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 18:07:10,837 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-27 18:07:10,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275511097] [2020-10-27 18:07:10,843 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 18:07:10,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:07:10,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 18:07:10,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 18:07:10,863 INFO L87 Difference]: Start difference. First operand 1123 states. Second operand 4 states. [2020-10-27 18:07:29,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:07:29,506 INFO L93 Difference]: Finished difference Result 3123 states and 5754 transitions. [2020-10-27 18:07:29,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 18:07:29,509 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 31 [2020-10-27 18:07:29,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:07:29,549 INFO L225 Difference]: With dead ends: 3123 [2020-10-27 18:07:29,550 INFO L226 Difference]: Without dead ends: 1936 [2020-10-27 18:07:29,562 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 18:07:29,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1936 states. [2020-10-27 18:07:29,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1936 to 1918. [2020-10-27 18:07:29,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1918 states. [2020-10-27 18:07:29,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1918 states to 1918 states and 2936 transitions. [2020-10-27 18:07:29,742 INFO L78 Accepts]: Start accepts. Automaton has 1918 states and 2936 transitions. Word has length 31 [2020-10-27 18:07:29,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:07:29,743 INFO L481 AbstractCegarLoop]: Abstraction has 1918 states and 2936 transitions. [2020-10-27 18:07:29,743 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 18:07:29,743 INFO L276 IsEmpty]: Start isEmpty. Operand 1918 states and 2936 transitions. [2020-10-27 18:07:29,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-10-27 18:07:29,749 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:07:29,750 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 18:07:29,750 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 18:07:29,750 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:07:29,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:07:29,751 INFO L82 PathProgramCache]: Analyzing trace with hash -537988296, now seen corresponding path program 1 times [2020-10-27 18:07:29,752 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:07:29,752 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [618827689] [2020-10-27 18:07:29,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:07:29,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:07:29,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:07:30,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:07:31,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:07:31,588 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:07:31,589 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 119 [2020-10-27 18:07:31,589 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 18:07:31,589 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1777 [2020-10-27 18:07:31,593 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:07:31,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:07:31,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 86 [2020-10-27 18:07:31,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-27 18:07:31,594 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-27 18:07:31,740 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:07:31,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:07:31,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:07:31,755 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:07:31,755 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:07:31,755 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:07:31,755 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 18:07:31,756 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:07:31,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:07:31,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:07:31,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:07:31,756 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:07:31,786 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:07:31,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:07:31,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:07:31,962 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:07:31,962 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-27 18:07:31,963 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:07:31,963 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 150 [2020-10-27 18:07:31,963 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:07:31,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:07:31,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:07:31,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-27 18:07:31,964 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 18:07:32,032 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 22 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 18:07:32,033 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [618827689] [2020-10-27 18:07:32,033 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:07:32,034 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 18:07:32,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237275411] [2020-10-27 18:07:32,037 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 18:07:32,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:07:32,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 18:07:32,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 18:07:32,043 INFO L87 Difference]: Start difference. First operand 1918 states and 2936 transitions. Second operand 5 states. [2020-10-27 18:07:55,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:07:55,481 INFO L93 Difference]: Finished difference Result 4686 states and 7486 transitions. [2020-10-27 18:07:55,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 18:07:55,487 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 107 [2020-10-27 18:07:55,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:07:55,507 INFO L225 Difference]: With dead ends: 4686 [2020-10-27 18:07:55,507 INFO L226 Difference]: Without dead ends: 2774 [2020-10-27 18:07:55,516 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 18:07:55,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2774 states. [2020-10-27 18:07:55,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2774 to 2766. [2020-10-27 18:07:55,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2766 states. [2020-10-27 18:07:55,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2766 states to 2766 states and 3980 transitions. [2020-10-27 18:07:55,670 INFO L78 Accepts]: Start accepts. Automaton has 2766 states and 3980 transitions. Word has length 107 [2020-10-27 18:07:55,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:07:55,673 INFO L481 AbstractCegarLoop]: Abstraction has 2766 states and 3980 transitions. [2020-10-27 18:07:55,673 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 18:07:55,673 INFO L276 IsEmpty]: Start isEmpty. Operand 2766 states and 3980 transitions. [2020-10-27 18:07:55,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-10-27 18:07:55,686 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:07:55,686 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 18:07:55,686 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 18:07:55,686 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:07:55,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:07:55,688 INFO L82 PathProgramCache]: Analyzing trace with hash 1785288923, now seen corresponding path program 1 times [2020-10-27 18:07:55,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:07:55,689 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1884960240] [2020-10-27 18:07:55,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:07:55,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:07:55,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:07:56,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:07:56,968 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:07:56,969 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 133 [2020-10-27 18:07:56,969 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 18:07:56,969 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1211 [2020-10-27 18:07:56,969 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:07:56,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:07:56,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 99 [2020-10-27 18:07:56,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-27 18:07:56,970 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:07:57,104 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:07:57,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:07:57,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:07:57,117 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:07:57,117 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:07:57,117 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:07:57,117 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 18:07:57,118 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:07:57,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:07:57,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:07:57,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:07:57,118 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:07:57,149 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:07:57,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:07:57,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:07:57,285 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:07:57,285 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-27 18:07:57,285 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:07:57,285 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 106 [2020-10-27 18:07:57,285 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:07:57,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:07:57,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:07:57,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 84 [2020-10-27 18:07:57,286 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:07:57,372 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 22 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 18:07:57,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1884960240] [2020-10-27 18:07:57,374 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:07:57,374 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 18:07:57,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129556395] [2020-10-27 18:07:57,376 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 18:07:57,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:07:57,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 18:07:57,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 18:07:57,379 INFO L87 Difference]: Start difference. First operand 2766 states and 3980 transitions. Second operand 5 states. [2020-10-27 18:08:17,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:08:17,215 INFO L93 Difference]: Finished difference Result 7984 states and 11647 transitions. [2020-10-27 18:08:17,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 18:08:17,222 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 121 [2020-10-27 18:08:17,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:08:17,251 INFO L225 Difference]: With dead ends: 7984 [2020-10-27 18:08:17,252 INFO L226 Difference]: Without dead ends: 5224 [2020-10-27 18:08:17,260 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 18:08:17,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5224 states. [2020-10-27 18:08:17,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5224 to 5219. [2020-10-27 18:08:17,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5219 states. [2020-10-27 18:08:17,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5219 states to 5219 states and 7104 transitions. [2020-10-27 18:08:17,407 INFO L78 Accepts]: Start accepts. Automaton has 5219 states and 7104 transitions. Word has length 121 [2020-10-27 18:08:17,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:08:17,408 INFO L481 AbstractCegarLoop]: Abstraction has 5219 states and 7104 transitions. [2020-10-27 18:08:17,408 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 18:08:17,409 INFO L276 IsEmpty]: Start isEmpty. Operand 5219 states and 7104 transitions. [2020-10-27 18:08:17,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-10-27 18:08:17,411 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:08:17,411 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 18:08:17,411 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 18:08:17,411 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:08:17,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:08:17,412 INFO L82 PathProgramCache]: Analyzing trace with hash 1654523997, now seen corresponding path program 1 times [2020-10-27 18:08:17,412 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:08:17,412 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [949704574] [2020-10-27 18:08:17,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:08:17,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:08:17,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:08:17,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:08:18,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:08:18,939 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:08:18,946 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 136 [2020-10-27 18:08:18,946 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 18:08:18,947 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1483 [2020-10-27 18:08:18,947 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:08:18,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:08:18,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 103 [2020-10-27 18:08:18,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-27 18:08:18,947 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:08:19,062 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:08:19,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:08:19,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:08:19,074 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:08:19,074 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:08:19,074 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:08:19,074 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 18:08:19,075 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:08:19,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:08:19,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:08:19,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:08:19,075 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:08:19,105 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:08:19,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:08:19,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:08:19,272 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:08:19,273 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-27 18:08:19,273 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:08:19,273 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 146 [2020-10-27 18:08:19,273 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:08:19,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:08:19,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:08:19,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-10-27 18:08:19,275 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 18:08:19,332 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 22 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 18:08:19,333 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [949704574] [2020-10-27 18:08:19,333 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:08:19,333 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 18:08:19,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415467398] [2020-10-27 18:08:19,334 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 18:08:19,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:08:19,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 18:08:19,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 18:08:19,337 INFO L87 Difference]: Start difference. First operand 5219 states and 7104 transitions. Second operand 5 states. [2020-10-27 18:08:41,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:08:41,617 INFO L93 Difference]: Finished difference Result 15326 states and 21297 transitions. [2020-10-27 18:08:41,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 18:08:41,619 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 124 [2020-10-27 18:08:41,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:08:41,676 INFO L225 Difference]: With dead ends: 15326 [2020-10-27 18:08:41,676 INFO L226 Difference]: Without dead ends: 10113 [2020-10-27 18:08:41,692 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 18:08:41,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10113 states. [2020-10-27 18:08:42,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10113 to 10108. [2020-10-27 18:08:42,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10108 states. [2020-10-27 18:08:42,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10108 states to 10108 states and 13239 transitions. [2020-10-27 18:08:42,040 INFO L78 Accepts]: Start accepts. Automaton has 10108 states and 13239 transitions. Word has length 124 [2020-10-27 18:08:42,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:08:42,042 INFO L481 AbstractCegarLoop]: Abstraction has 10108 states and 13239 transitions. [2020-10-27 18:08:42,042 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 18:08:42,042 INFO L276 IsEmpty]: Start isEmpty. Operand 10108 states and 13239 transitions. [2020-10-27 18:08:42,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2020-10-27 18:08:42,050 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:08:42,051 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 18:08:42,051 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 18:08:42,051 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:08:42,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:08:42,052 INFO L82 PathProgramCache]: Analyzing trace with hash 1953469998, now seen corresponding path program 1 times [2020-10-27 18:08:42,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:08:42,055 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1125874934] [2020-10-27 18:08:42,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:08:42,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:08:42,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:08:42,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:08:42,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:08:43,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:08:47,115 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:08:47,115 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 213 [2020-10-27 18:08:47,115 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 18:08:47,116 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-27 18:08:47,116 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:08:47,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:08:47,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 180 [2020-10-27 18:08:47,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-27 18:08:47,116 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:08:47,301 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:08:47,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:08:47,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:08:47,318 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:08:47,318 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:08:47,318 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:08:47,319 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 18:08:47,319 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:08:47,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:08:47,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:08:47,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:08:47,320 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 18:08:47,361 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:08:47,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:08:47,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:08:47,407 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:08:47,407 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-27 18:08:47,407 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:08:47,408 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 38 [2020-10-27 18:08:47,408 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:08:47,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:08:47,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:08:47,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:08:47,409 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 18:08:47,455 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2020-10-27 18:08:47,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:08:47,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:08:47,593 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:08:47,599 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-27 18:08:47,599 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:08:47,599 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 108 [2020-10-27 18:08:47,599 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:08:47,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:08:47,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:08:47,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-27 18:08:47,604 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-27 18:08:47,677 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 47 proven. 2 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2020-10-27 18:08:47,678 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1125874934] [2020-10-27 18:08:47,678 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:08:47,679 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 18:08:47,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663939316] [2020-10-27 18:08:47,681 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 18:08:47,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:08:47,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 18:08:47,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 18:08:47,685 INFO L87 Difference]: Start difference. First operand 10108 states and 13239 transitions. Second operand 5 states. [2020-10-27 18:09:17,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:09:17,644 INFO L93 Difference]: Finished difference Result 23480 states and 32045 transitions. [2020-10-27 18:09:17,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 18:09:17,646 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 199 [2020-10-27 18:09:17,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:09:17,708 INFO L225 Difference]: With dead ends: 23480 [2020-10-27 18:09:17,709 INFO L226 Difference]: Without dead ends: 13378 [2020-10-27 18:09:17,741 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 18:09:17,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13378 states. [2020-10-27 18:09:18,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13378 to 13366. [2020-10-27 18:09:18,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13366 states. [2020-10-27 18:09:18,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13366 states to 13366 states and 17643 transitions. [2020-10-27 18:09:18,137 INFO L78 Accepts]: Start accepts. Automaton has 13366 states and 17643 transitions. Word has length 199 [2020-10-27 18:09:18,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:09:18,137 INFO L481 AbstractCegarLoop]: Abstraction has 13366 states and 17643 transitions. [2020-10-27 18:09:18,137 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 18:09:18,138 INFO L276 IsEmpty]: Start isEmpty. Operand 13366 states and 17643 transitions. [2020-10-27 18:09:18,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2020-10-27 18:09:18,143 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:09:18,143 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 18:09:18,145 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 18:09:18,146 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:09:18,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:09:18,146 INFO L82 PathProgramCache]: Analyzing trace with hash -620027436, now seen corresponding path program 1 times [2020-10-27 18:09:18,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:09:18,147 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [48936643] [2020-10-27 18:09:18,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:09:18,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:09:18,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:09:18,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:09:18,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:09:18,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:09:19,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:09:20,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:09:23,188 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:09:23,189 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 217 [2020-10-27 18:09:23,189 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 18:09:23,189 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-27 18:09:23,189 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:09:23,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:09:23,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 183 [2020-10-27 18:09:23,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-27 18:09:23,190 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:09:23,356 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:09:23,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:09:23,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:09:23,370 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:09:23,370 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:09:23,370 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:09:23,370 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 18:09:23,370 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:09:23,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:09:23,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:09:23,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:09:23,371 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:09:23,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:09:23,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:09:23,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:09:23,455 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:09:23,456 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-27 18:09:23,456 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:09:23,456 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 30 [2020-10-27 18:09:23,457 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:09:23,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:09:23,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:09:23,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:09:23,457 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:09:23,488 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2020-10-27 18:09:23,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:09:23,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:09:23,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:09:23,676 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:09:23,677 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-27 18:09:23,677 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 18:09:23,677 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 164 [2020-10-27 18:09:23,677 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:09:23,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:09:23,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 75 [2020-10-27 18:09:23,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 18:09:23,678 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:09:23,769 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 47 proven. 2 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-10-27 18:09:23,769 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [48936643] [2020-10-27 18:09:23,769 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:09:23,770 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 18:09:23,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440100407] [2020-10-27 18:09:23,771 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 18:09:23,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:09:23,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 18:09:23,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-27 18:09:23,772 INFO L87 Difference]: Start difference. First operand 13366 states and 17643 transitions. Second operand 6 states. [2020-10-27 18:10:06,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:10:06,930 INFO L93 Difference]: Finished difference Result 46333 states and 66372 transitions. [2020-10-27 18:10:06,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 18:10:06,934 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 203 [2020-10-27 18:10:06,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:10:07,071 INFO L225 Difference]: With dead ends: 46333 [2020-10-27 18:10:07,071 INFO L226 Difference]: Without dead ends: 32973 [2020-10-27 18:10:07,111 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-10-27 18:10:07,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32973 states. [2020-10-27 18:10:07,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32973 to 32920. [2020-10-27 18:10:07,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32920 states. [2020-10-27 18:10:08,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32920 states to 32920 states and 44805 transitions. [2020-10-27 18:10:08,056 INFO L78 Accepts]: Start accepts. Automaton has 32920 states and 44805 transitions. Word has length 203 [2020-10-27 18:10:08,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:10:08,057 INFO L481 AbstractCegarLoop]: Abstraction has 32920 states and 44805 transitions. [2020-10-27 18:10:08,057 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 18:10:08,057 INFO L276 IsEmpty]: Start isEmpty. Operand 32920 states and 44805 transitions. [2020-10-27 18:10:08,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2020-10-27 18:10:08,065 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:10:08,065 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 18:10:08,066 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 18:10:08,066 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:10:08,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:10:08,066 INFO L82 PathProgramCache]: Analyzing trace with hash -540845400, now seen corresponding path program 1 times [2020-10-27 18:10:08,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:10:08,069 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [101236148] [2020-10-27 18:10:08,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:10:08,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:10:08,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:10:08,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:10:10,153 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:10:10,154 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 236 [2020-10-27 18:10:10,154 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 18:10:10,154 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2016 [2020-10-27 18:10:10,155 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:10:10,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:10:10,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 203 [2020-10-27 18:10:10,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-27 18:10:10,155 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 18:10:10,340 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-27 18:10:10,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:10:10,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:10:10,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:10:10,356 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:10:10,356 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:10:10,356 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:10:10,356 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 18:10:10,357 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:10:10,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:10:10,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:10:10,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:10:10,357 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:10:10,401 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:10:10,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:10:10,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:10:10,806 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:10:10,806 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 194 [2020-10-27 18:10:10,806 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:10:10,806 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 321 [2020-10-27 18:10:10,807 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:10:10,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:10:10,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:10:10,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 188 [2020-10-27 18:10:10,807 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:10:11,053 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 22 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 18:10:11,053 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [101236148] [2020-10-27 18:10:11,053 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:10:11,053 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 18:10:11,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040423291] [2020-10-27 18:10:11,054 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 18:10:11,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:10:11,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 18:10:11,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 18:10:11,056 INFO L87 Difference]: Start difference. First operand 32920 states and 44805 transitions. Second operand 5 states. [2020-10-27 18:10:36,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:10:36,169 INFO L93 Difference]: Finished difference Result 87817 states and 122340 transitions. [2020-10-27 18:10:36,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 18:10:36,172 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 224 [2020-10-27 18:10:36,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:10:36,382 INFO L225 Difference]: With dead ends: 87817 [2020-10-27 18:10:36,382 INFO L226 Difference]: Without dead ends: 54903 [2020-10-27 18:10:36,571 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 18:10:36,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54903 states. [2020-10-27 18:10:38,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54903 to 54838. [2020-10-27 18:10:38,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54838 states. [2020-10-27 18:10:38,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54838 states to 54838 states and 76538 transitions. [2020-10-27 18:10:38,696 INFO L78 Accepts]: Start accepts. Automaton has 54838 states and 76538 transitions. Word has length 224 [2020-10-27 18:10:38,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:10:38,696 INFO L481 AbstractCegarLoop]: Abstraction has 54838 states and 76538 transitions. [2020-10-27 18:10:38,696 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 18:10:38,697 INFO L276 IsEmpty]: Start isEmpty. Operand 54838 states and 76538 transitions. [2020-10-27 18:10:38,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 289 [2020-10-27 18:10:38,714 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:10:38,715 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 18:10:38,715 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 18:10:38,715 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:10:38,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:10:38,716 INFO L82 PathProgramCache]: Analyzing trace with hash 819850754, now seen corresponding path program 1 times [2020-10-27 18:10:38,716 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:10:38,716 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [701527513] [2020-10-27 18:10:38,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:10:38,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:10:38,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:10:39,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:10:39,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:10:39,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:10:39,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:10:40,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:10:41,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:10:43,139 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:10:43,140 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 302 [2020-10-27 18:10:43,140 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 18:10:43,140 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4339 [2020-10-27 18:10:43,140 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:10:43,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:10:43,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 268 [2020-10-27 18:10:43,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-27 18:10:43,141 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:10:43,350 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-27 18:10:43,351 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:10:43,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:10:43,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:10:43,361 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:10:43,362 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:10:43,362 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:10:43,362 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 18:10:43,362 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:10:43,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:10:43,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:10:43,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:10:43,363 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:10:43,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:10:43,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:10:43,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:10:43,466 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:10:43,467 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-27 18:10:43,467 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:10:43,467 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 37 [2020-10-27 18:10:43,468 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:10:43,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:10:43,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:10:43,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:10:43,469 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 18:10:43,515 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2020-10-27 18:10:43,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:10:43,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:10:43,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:10:44,029 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:10:44,030 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 165 [2020-10-27 18:10:44,030 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 18:10:44,030 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 455 [2020-10-27 18:10:44,030 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:10:44,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:10:44,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 157 [2020-10-27 18:10:44,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 18:10:44,031 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:10:44,236 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 47 proven. 2 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2020-10-27 18:10:44,236 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [701527513] [2020-10-27 18:10:44,237 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:10:44,237 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 18:10:44,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68620106] [2020-10-27 18:10:44,238 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 18:10:44,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:10:44,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 18:10:44,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-27 18:10:44,239 INFO L87 Difference]: Start difference. First operand 54838 states and 76538 transitions. Second operand 6 states. [2020-10-27 18:10:44,412 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 66